Mn对Al_Mg_Si_Cu铝合金结晶相的影响_图文.doc

第14卷第11期Vol.14No.11 中国有色金属学报 The Chinese Journal of Nonferrous Metals 2004年11月 Nov. 2004 文章编号200411190606 Mn对Al Mg Si Cu铝合金结晶相的影响 刘 宏1,2,刘艳华1,赵 刚1,刘春明1,左 良1 (1.东北大学材料与冶金学院,沈阳110004; 2.山东轻工业学院机电工程学院,济南250100 摘 要:通过扫描电镜/能谱、X射线衍射以及金相分析,针对含0.3%Fe(质量分数的Al M g Si Cu铝合金,研究了M n含量对其结晶相的影响。研究表明:合金在铸造过程中形成的结晶相为Al1.9CuM g4.1Si3.3,Al5(F eM nSi, A l8(FeM n2Si以及少量的M g2Si;增大含M n量,合金中A lFeM nSi型结晶相数量增多;对合金进行均匀化处理 时,A l1.9CuM g4.1Si3.3相完全溶解,发生Al5(F eM nSi向Al8(FeM n2Si相的转变;对合金进行轧制及最终热处理后,结晶相碎化且沿轧向呈纤维状分布,但结晶相的类型不变。 关键词:A l M g Si Cu铝合金;结晶相;Al1.9CuM g4.1Si3.3;A l5FeSi;A l8F e2Si 中图分类号:T G146.21文献标识码:A Effects of Mn on constituents of Al Mg Si Cu alloys LIU H ong1,2,LIU Yan hua1,ZHAO Gang1,LIU Chun ming1,ZUO Liang1 (1.School of M aterials and Metallurgy,Northeastern U niversity,Shenyang110004,China; 2.School of M echanical and Electrical Eng ineering, Shandong Institute of Light Industry,Ji nan250100,China Abstract:By means o f scanning electron microscope/energ y spectrum,X ray diffraction and metallographic analysis, t he effect of M n content on the const ituents of Al M g Si Cu aluminium allo ys containing0.3%Fe(mass fractionw as studied.T he results indicate that the constituents formed during cast of allo ys are A l1.9CuM g4.1Si3.3,Al5 (FeM nSi,Al8 (FeM n2Si and a little M g2Si.W ith incr ement of M n content,the number of the constituents of Al(FeM nSi is in creased.During ho mog enizing tr eatment,the A l1.9CuM g4.1Si3.3phase dissolves completely,and the phase tr ansformation of Al5(FeM nSi to A l8(FeM n2Si occurs.But the morpholog y and distribution have not variation.After rolling and final heat treatment,the constituents ar e crushed and distribute in continuous lines along rolling direction.How ev er,types of t he constituents vary no longer. Key words:Al M g Si Cu aluminium alloys;constituents;Al1.9CuM g4.1Si3.3;Al5FeSi;Al8Fe2Si 工业Al M g Si Cu铝合金中常添加锰元素,目的是在铸锭均匀化处理过程中形成细小的(粒径约0.1 m弥散相粒子,以阻碍合金的再结晶,细化晶粒,并且使滑移变形均匀,提高合金的塑性[1,2]。而工业用Al Mg Si Cu铝合金通常含有约0.3%(质量分数的Fe,铸造时极易